Work-holding and positioning means



Aug. 2l, 1945. E. Q. KRUCHTEN l 2,383,201

WORK HOLDING AND POSITIONING MEANSl Filed March 2. 1942 5 Sheets-Sheet JL Aug. 21, 1945.

E. Q. KRUCHTEN WORK HOLDING A Filed March 2, 1942 ND POSITIONING MEANS S sheets-sheet 2 @y fm @may Aug. 21, 1945. E, Q. KRucH'rEN WORK HOLDING AND POSITIONING MEANS Filed March 2, 1942 5 Sheets-Sheet 3 v-r l,

Aug. 21, 1945. E Q KRUCHTEN l2,383,201

WORK HOLDING AND POSITIONING MEANS 5 Sheets-Sheet 5 I I I I I E. Q. KRUCHTEN Filed March 2. 1942 I I I WORK HOLDING AND POSITIONING MEANS Aug. 2l, 1945.

Patented Aug. 21, 1945 UNITED STATES PATENT OFFICE A I WORK-HOLDING :SIISITIONING I Edward Q. Kruchten, Chicago, Ill. Application Marc 2, (Cline-63) o.

11 Chinas.

My invention relates more particularly tewerkholding and positioning means forming parts of Y a drill press to be used in connection with the.

operation of the press as for example for drilling. routing, carving and mortlsing and the producing of layouts and the spacing of work.

One of my more general objects is to speed up and simplify the various operations referred to.

' to be eiected at greater speed and in a simpler manner than hitherto possible; and other objects as will be manifest from the following description.

Figure 1 is a view in front elevation of a drill press of common construction modied to embody my invention for use in the drilling, routing. etc., of work.

Figure 2 is a view in side elevation of the machine of Fig. 1.

Figure 3 is an enlarged plan view of the upper work-table of the press of Fig. 1, with my workholdlng and positioning means thereon.

Figure 4 is a plan view of the upperwork-table of the press stripped of work-holding and positloning means carried thereby.

Figure 5 is a view in front elevation of the structure shown in Fig. 5.

Figure 6 is a section taken at the line 5 on Fig. 3 A'and viewed in. the direction of the arrow.

Figure '7 is a section taken atthe line 1 on Fig. 3 and viewed in the direction of the arrow.A

Figure 8 is a view like Fig. 3 ofthe upper worktable of the press showing it equipped with workholding and positioning `means embodying 'my invention, for use when it is desired the work bev shifted along a predetermined arcuate path.

Figure 9 is a section taken at the line 9 on Fig. 8 and viewed in the direction of the arrow.

Figure 10 is an enlarged section taken at the line I 0 on Fig. 8 and viewed in the direction of the arrow.

Figure 1l is a plan view of a piece of work to be operated on as for example to be drilled to form a circular series of holes Vin the work, illustrating the positioning of the work relative to the drill of the press for drilling the rst hole of the series thereof.

Figure 12 is a plan View of the work of Fig. 11 showing the series of holes drilled therein.

Figure 13 isa plan view of the lower worktable of the press showing, by dotted lines, the work-holding and positioning means of Figs. 1-7, and 8-10, applied thereto.

Figure 14 is a view in side elevation of one of the 'similar clamping bolts forming parts of the structure on Fig. 13; and

Figure 15, an end view of the bolt ofFlg. 14.

I have illustrated my invention as incorporated in a drill press of a Well known construction and tlllenrefore a general description of the press will s ce.

It comprises a base 20 affording a lower horizontal work-table 2l; a. column 22 rising from the base 20; an upper work-table 23 mounted on the column 22 and adjustable up and down and rotatable thereon. being heldin adjustedpositlon by a clamp 24; a head 25 rotatable about, and movable up and down on, the column 22; a quill 25a vertically adjustable inthe head 25 and a motor 26 on the head 25. The quill 25a contains a spindle rotatable therein and carrying a tool-chuck 21, shown as clutching a drill 28 in place. the spindle being rotated through the medium of mechanism (not shown) driven from the motor 26 by a belt 29 engaging a. pulley 30 on the armature shaft 3| of the motor 26.

' allel slots 42 and 43 which in the applied posi` In accordance with one construction of such commonly known drill press, the upper table 23 has, four radial slots, 32, 33, 34 and 35 therein tion as'applied to the upper table 23, the holding` and positioning means for the work to be operated on by the tool in the drill press and shown as a drill, comprises a plate 39 formed of the plate member 49 and a bar 4| rigid therewith, the plate member 40 of the plate 39 having a pair of partion of the `plate 39 to the table 23 intersect theradial slots 32, 33, 34 and 35 in the table 23. The bar portion 4| of the plate 39 which is located between the points of intersection of the parallel and radial slots is formed with an undercut guide-way 44 in its upper surface extending lengthwise ol' the bar-portion 4| throughout the length of the latter.

'I'he means now` being described also comprise a parirA of clampjaws 45 and 48 having base portions "and ,48 at which they are slidable on the bar-portion 4|, being held in independently adjusted position along the bar portion 4| by ed studs 50 rising from the heads 49 through the base portions 41 and 48 and clamp nuts 6| screwed on the upper threaded ends of the studs 50 and against the base portions 41 and 48, the base portion of the clamp 45 having a rib 62 which extends into the undercut groove 44 preventing the clamp 45 from rotating on the plate 39.

The inner edges of the base portions 41 and 46 of the clamps 45 and 46 are provided with vertical flanges 53 and 54, respectively, at which to clamp the work. The clamp 46 is free to swing about its clamp bolt 50 as a pivot and is provided at itsinner face with a plate 55 normally yieldingly drawn toward this face by coil springs 56 surrounding pins 51 secured to the Plate 55 and confined between heads 58 on these pins and the flange 54. The plate 55 is thus adapted to be adjusted against the work to be clamped by means of set screws 59 screwed in the flange 54 and bearing against the plate 55.

The plate 39 is provided on its upper surface with a lineal scale exposedl to view between the clamp jaws 45 and 46 and reading in` opposite directions from center line markings 50 which, if extended, would intersect the center of a threaded opening 6I in the center of the plate 39, the arrangement described permitting the clamps 45 and 46 to be adjusted -to any of equal 'distances from the center opening 6 I The structure also comprises a pair of clamp bolts 62 and 63 which extend throughthe parallel slots 42 and 43 and diametrically opposed ones of the radial slots, as for example lthe slots 32 and 34 as shown in Fig. 3.

In the loosened condition of the clamp bolts 62 and 63 the plate 39, with the work clamped thereon, has universal movement on vthe .table 23 in a. horizontal plane throughout somewhat more than 90 and by reversing rthe positions of the clamp bolts 62 and 63, upon reaching Ythe limit of'rotatable adjustment of the plate 39 on the table 23 in the first installation of theclamp bolts, to position these bolts in the parallel slots 42 and 43 and in the others of the diametrically opposed radial'slots-the slots 33 and 35 in the example above givenuniversal movement of the-plate 39 on the table 28` in a horizontal plane throughout ontlie table 23 into accurate registration with assaaoi as shown by dotted lines in Figs. 1, 2 and 13 the the-tool I8 in the press for operating on the work V 25a, and with it the chuckand tool 28, is lowered to engage the tool with the work. l

The assembly of the work-holding plate 39 and clamps 45 and 46 with the lower table 2| Vand with two clamp bolts herein represented lat 54 and 55 positioned in the slots 42 and 43 in the plate 39 and in the slots 31 and 38 in the table 2|, all as shown by dotted lines in Figs. 1, 2 and 13, also work holding and positioning means may have `universal movement throughout substantially 180 and to permit of such movement throughout the remaining 180 the clamp bolts 84 and 65, which in this operation have moved to the opposite ends of the slots in which they were originallylocated, would be removed from these slots. and the clampbolt 64 repositioned lin the longitudinal slot 43 at the end vthereof ODDOsite that in which it was originally positioned and positioned in the radial slot 38 in the position originally occupied by the clamp bolt 65 and the clamp bolt 65 repositioned in the longitudinal slot 42, at

the end thereof opposite that in which it was originally positioned and positioned in the radial slot 31 in the position originally occupied by the clamping bolt 64.

The clamp-bolts 64 and 65 are shown of a special form to permit them to betightened and loosened at their upper ends rather than at their lower ends which would require applying the wrench to the underside of the table 2| which is commonly rather diiicult because of the design of the press. To this end the heads 65 of the clamp bolts 64 and 65which would be positioned at the underside of the table 2| are preferably elongated, as shown, permitting them to be passed.' downwardly through the longitudinal and radial slots referred to and upon partial rotation lap the undersurface of the table 2|, the nuts 61 of the clamp bolts being screwed upon the upper ends of the Shanks of these bolts.

Referring now to the construction shown in Figs. 8, 9 and 10 for-drilling, by way of example,

- a circular series of holes in the work as shown in Fig.V 12,` and supported on the upper table 23;

this construction is identical with that shown in Figs. 1-7, inclusive,- except for the addition of a protractor disk 1| interposed between the plate 39 and the table 23 and means connecting together this plate and disk for rotatable adjustment, as a unit, on the table 23 about the axis of the opening 6 The means just referred to are shown as comprising a clamp-screw 12 which extends through the opening 36 in the table 23 and a central opening 13 in the disk 1| and screws into the threaded central opening 6| in the plate 39, and a washer 14 at the underside of the disk 1| and surroundingV the screw 12 above its head 15 and rotatable in the opening 35 in the table 23, the disk 1| and washer 14 being clamped between the plate 439 and the screw-head 15 upon tightening the screw 12. To ensure against rotational relative displacement of the plate 39 and disk 1 I, the disk 1| is formed with struck-up projections 16 at equally spaced intervals thereon in a circular series about the center of the disk 1| for registration with sockets 11 similarly spaced in a circular series in the underface of the plate 39.

The protractor disk 1I has parallel slots 18 and 19 therein which register with the parallel slots 42 and 43, respectively, in the plate 39 to positions of adjustment of the plate 39, which in the case of this particular assembly are rotational only about the axis of the clamp screw 12. l

The peripheral portion of the disk 1| extends radially outwardly beyond the marginal edges of the plate 39 and bears a circular protractor scale on its upper surface, graduated to representl degrees, each quarter segment thereof being graduated from to 90 asshown, the upper surfaces of the projecting corners of the table 23 having indexing marks 80, 81,82 and 83 spaced apart 90 for cooperation with the protractor scale.

In the use of this arrangement for drilling thev work, represented at 84 in Figs. 1l and 12 as a square block to be drilled for producing equidistantly spaced holes 85 Aarranged in a circular series --in a predetermined position in the work, the

to line up with the tool 28, the center 86 about which the circular series of holes 85 to be drilled,

is described, as shown by the full line positioning o! the drill 28 in Fig. 11. The table 23 would then be rotatably adjusted about the column 22, andthe work-holding and positioning means about their central pivot 12, `to vertically aline a punch mark 81 on the Work with the drill 2 8 shown by dotted lines so alinediFig. 11), the

punch-mark 81 having previously been made in the work to indicate the location of the circum- `ference of the circle to be described by the circular series of holes (the radius of the circle` being measured from the center of said circular series of holes to the center of the holes of said,

series) `and to indicate the exact location 'of the iirst hole to be drilled. The clamp bolts 62 and 63 are then tightened and the rst hole drilled.

The operator, in such positioning of the parts for drilling the rst ofthe holes 85, notes the degree marking on the scale of the protractor disk 1| which 'registers with the indexing marks 88--83 (the reading -being the same at each of these marks) and for the drilling of the second of the holes 85 of the series ilrst loosens the clamp bolts 62 and 63 and then rotates the unitary work holding and positioning means and protractor disk 1I the number of degrees corresponding with the center to center spacing of the adjacent ones of the desired lholes 85, maintaining the table 23 in its position of rotational adjustment about the column 22 in alining the drill I8 with the punch-mark 81; it being understood that the operator has previously computed the number ot degrees of the desired spacing of theholes 85.

He then tightens the clamp'bolts 62 and 63 and proceeds to drill such second hole. The cycle oi operations above described. is repeated for the drilling of the remaining ones of the holes 85 drill 28 is accomplished by rotating the head 25 about the columnand slidably adjusting the work in the clamps 45 and 46 tothe proper position. The head 2 5 is then rotated on the column 22 `and the work holding and positioning means lrotated about their central pivot 12 at the opening 2 la, to aline the drill'28 with the punch-mark 81.

. In this case the clamlp bolts 62 and 63 after intermittent rotations of the work holding and p0- sitioning means and the protractor disk 1l throughout 180, would -be reposltioned in the slots in the table 2| and plate 38 for permitting rotation of these means and disk on the table 2l throughout the remaining 180 to complete full 4 rotation of these parts as explained above in connectlon with these means where the protractor disk 1| is omitted.

It will Ibe understood that in case the protractor feature is not to be availed of for the determining of the spacing of the holes in an arcuate arrangement, in which case the work would be `punch-marked for the location of each hole,

nevertheless the feature oi' providing a pivoting means for the unit comprising the plate 39 and the Work-clamping features may be used to advantage.

While .I have illustrated certain particular constructions constituting embodiments of my invention, I do not wish to be understood as intending tolimit my invention thereto as the same may be variously modiiled and altered and ithe invention embodied in other forms of structure Without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is: e

1. Work-holding and positioning means for use Hwith work tables having either parallel or radial slots, comprising: a plate having a plurality of spaced apart slots, portions ofsaid slots registering with slots in a table when centered thereon in different positions of rotation, means to releasafbly secure said -plate to said table in adjusted positions, said means positioned in registering portions of the slots in the table and plate, a circular plate underlying said first named plate andformed with slots registering with the slots of the rst named plate, means to preserve registry of said plateand means to pivot the registering plates upon the table.

2. The combination of a work table, work-holding and positioning means comprising a plate pivoted on said table, both said table and plate having slots spaced apart, portions of said slots in said table and plate intersecting in different positions of rotational adjustment of said plate, means for indicating the degree of rotatable adjustment of said plate, comprising a protractor disk formed separate from said plate and disposed between said plate and table and rotatable with said plate, and means for releasaibly securing said plate to said table in rotatably adjusted position thereon positioned in certainof the slotsaid tabla'means for releasably securing said plate i and pivot means to center said combined plates with a table. K

4. Work-holding and positioning means for useV with work tables having either radial or parallel slots, comprising: a plate formed with slots spaced apart; removable-means to pivot said plate ori a table of either of said types; portions 0i said p late. slots intersecting in different positions of rotational adjustment on the table with diierent portions of the table slots with the pivoting means in place and in different positions of universal adjustment of the plate on the table with the pivoting means removed; means for indicating the degree of rotational adjustment of the plate on the table; means for releasalbly securing said plate to a table of either of said ty-pes in adjusted position thereon positioned in certain of the slot intersections and when loosened permitting adjustment of the plate 'on the table; and means carried by said plate to hold Work in position thereon, comprising a pair of vise jaws each adjustable in a rectilinear path on said plate to any position thereon in said rectilinear path.

5. Work-holding and positioning means for uSe Iwith work tables having either radial or parallel slots, comprising; a plate formed with slots spaced apart; removable means to pivot said plate on a table of either of said types comprising a protractor disk formed separate from said plate, slotted in conformity with the slots of said plate, disposed between said plate and table and rotatable with said plate; means to pivot said disk and plate jointlyl on a table of either of said types; means to indicate the position of rotational adjustment of the disk and plate on the table; means l for releasaibly securing said plate on a table of either of said types in adjusted position thereon opposite sides of said vise and generally parallel to said line of jaw movement, each slot being at least as 10112 aS the shortest distance therebetween, portions of the slots of the table and plate registering in diierent positions of adjustment of the plate on the table; and at least two means for 'releasably securing said plate to the table in adjusted positions thereon, at least one securing means passing through each oi two slots in the plate and through registering portions of slots in the table.

9. Work-holding and positioning means for use with work tables having either parallel or radial slots, comprising: a vise having a base portion and at least one movable jaw portion movable along a given line; a plate of ,a size of the same order as that of the tables with which it is to be used, having said vise rigidly mounted on the up- -per surface thereof, said plate having at least two on positioned in certain of the slot intersections and when loosened permitting adjustment of the plate and disk on the table; and Work-holdingy means carried by said plate, formed to permit adjustment of any point of the work longitudinally of the plate in a rectilinear path.

6. Work-holding and positioning. means for use with work tables having either parallel or radial slots, comprising: a plate of a size of the same order as that of the tables with which it is to be used, having at least two continuous generally parallel slots, each slot being at least `as long as the shortest distance therebetween, portions of the slots of the table and plate registering in different positions of adjustment of the plate on the table; and at least two means for releasably securing said plate to the table in adjusted positions thereon, at least one securing means passing through each of two slots in the plate and through registering portions of slots in the table.

7. Work-holding and positioning means for use with work tables having either parallel or radial slots, comprising: a plate of a size of the same order as that of the tables with which it is to be used, having at least two continuous parallel slots of substantiallythe same length spaced the same distance as the slots in a parallel-slot table Vwith which it is to be used, each slot being at least as long as the distance therebetween, portions of the slots of the table and plate registering indifferent positions Aof adjustment of the plate on the table; and at least two .means for releasably securing said plate tothe table in adjusted positions thereon, at least one securing means passing through each of two slots in the plate and through registering portions of slots ln the table.

8. Work-holding and positioning means for use with work tables having either parallel or ra'dial slots, comprising: a vise having a base portion and at least one movable jaw portion movable along a given line; a plate of a size of the same order as that of the tables with which it is to 'be used, having said vise rigidly mounted on the upper surface thereof, said plate having at least two continuous generally parallel slots continuous parallel slots of substantially the same length spaced the same distance as the slots in a parallel-slot table with which it is to be used. each slot being at least as long as the distance therebetween, portions of the slots of the table and plate registering in different positions of adjustment of the plate on the table; and at least two means for releasably securing said plate to the -table in adjusted positions thereon, at least one securing means passing through each of two slots in the plate and throughregistering -portions of slots in the table.

10. Work-holding and positioning means for use with work tables having either parallel or radialY slots, comprisingz. a vise having a base portion and at least one movable jaw portion movable along a given line and means operative to adjust the relative positions of the jaws; a plate of a size of the same order as that of the tables with which it is to be used, having said vise rigidly mounted on the upper surface there,

of, said plate having at least two continuous generally parallel slots of substantially the same length on opposite sidesof said vise and generally parallel to said line of .jaw movement, each slot I being at least as long as the shortest distance therebetween, portions of the slots of 'the'table and plate registering in different positions oi adjustment of the plate on the table; and at least two means for releasably securing saidfplate to the table'in adjusted positions thereon, at least one securing means passing through each of l,two slots in the plate and through registering portions of slots in the table. v

11. Work-holding and positioning means for use with work tables having either parallel or radial slots, comprising: a plate of asize of the same order as that of the tables with which it is to be used, having at least two continuous pa allel slots of substantially the same length space the same distance as the slotsin a parallel-slot table with which itis to be usedvand a greater distance than that between the adjacent ends of opposite'slots in a radial-slot table with which it of the table and plate registering in diierent positions of adjustment of the plate on the table;

and at least two means for releasably securingv said plateto the table in adjusted positions thereon, at least one securing means passing through each of two slots in the plate and through registering' portions of slots in the table.

EDWARD Q. KRUQHTEN. 

